@inbook{56211606, author={John J. Ross, MD, CM, FIDSA and Allan H. Ropper, MD, FRCP}, editor={McKean, Sylvia C. and Ross, John J. and Dressler, Daniel D. and Brotman, Daniel J. and Ginsberg, Jeffrey S.}, title={Chapter 213. Multiple Sclerosis}, booktitle={Principles and Practice of Hospital Medicine}, publisher={The McGraw-Hill Companies}, address={New York, NY}, year={2012}, url={accessmedicine.mhmedical.com/content.aspx?aid=56211606} }